CVSS v3
9.1
CRITICAL
EPSS Score
72.1%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. A specially crafted series of HTTP requests can lead to command execution. An attacker must have administrator privileges to exploit this vulnerabilities.
A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. A specially crafted series of HTTP requests can lead to command execution. An attacker must have administrator privileges to exploit this vulnerabilities.
Active exploitation of CVE-2021-21809 has not been confirmed. The EPSS score is 72.1%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-21809 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
Ranked by exploit probability (EPSS).